net: phy: add support for a common probe between shared PHYs (0ef44e5c) · Commits · 戴 / test

Shared PHYs (PHYs in the same hardware package) may have shared registers and their drivers would usually need to share information. There is currently a way to have a shared (part of the) init, by using phy_package_init_once(). This patch extends the logic to share parts of the probe to allow sharing the initialization of locks or resources retrieval. Signed-off-by:

Antoine Tenart <antoine.tenart@bootlin.com> Reviewed-by:

Andrew Lunn <andrew@lunn.ch> Signed-off-by:

David S. Miller <davem@davemloft.net>

include/linux/phy.h

+15 −3

Original line number	Diff line number	Diff line
		@@ -245,6 +245,7 @@ struct phy_package_shared {

		/* used as bit number in atomic bitops */
		#define PHY_SHARED_F_INIT_DONE 0
		#define PHY_SHARED_F_PROBE_DONE 1

		/*
		* The Bus class for PHYs. Devices which provide access to
		@@ -1566,14 +1567,25 @@ static inline int __phy_package_write(struct phy_device *phydev,
		return __mdiobus_write(phydev->mdio.bus, shared->addr, regnum, val);
		}

		static inline bool phy_package_init_once(struct phy_device *phydev)
		static inline bool __phy_package_set_once(struct phy_device *phydev,
		unsigned int b)
		{
		struct phy_package_shared *shared = phydev->shared;

		if (!shared)
		return false;

		return !test_and_set_bit(PHY_SHARED_F_INIT_DONE, &shared->flags);
		return !test_and_set_bit(b, &shared->flags);
		}

		static inline bool phy_package_init_once(struct phy_device *phydev)
		{
		return __phy_package_set_once(phydev, PHY_SHARED_F_INIT_DONE);
		}

		static inline bool phy_package_probe_once(struct phy_device *phydev)
		{
		return __phy_package_set_once(phydev, PHY_SHARED_F_PROBE_DONE);
		}

		extern struct bus_type mdio_bus_type;

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